USDOT updates request for solutions for Brand New ATC System initiative Accelerated deadline for proposals is now Aug. 4, 2025. The US Department of Transportation (USDOT) has updated a request for solutions (RFS) for the Brand New Air Traffic Control (ATC) System initiative, which seeks to overhaul the US ATC framework within the next three to four years. The latest version of the FAA’s RFS was released Jul. 11, with responses due by Aug. 4, 2025.